package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestParam;

import java.lang.ref.PhantomReference;
import java.util.List;

/** 套餐业务实现 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

  @Autowired private SetmealMapper setmealMapper;
  @Autowired private SetmealDishMapper setmealDishMapper;
  @Autowired private DishMapper dishMapper;

  @Autowired private SetmealService setmealService;

  /**
   * 条件查询
   *
   * @param setmeal
   * @return
   */
  public List<Setmeal> list(Setmeal setmeal) {
    List<Setmeal> list = setmealMapper.list(setmeal);
    return list;
  }

  /**
   * 根据id查询菜品选项
   *
   * @param id
   * @return
   */
  public List<DishItemVO> getDishItemById(Long id) {
    return setmealMapper.getDishItemBySetmealId(id);
  }

  /**
   * 新增套餐新增套餐，同时需要保存套餐和菜品的关联关系
   *
   * @param setmealDTO
   */
  @Transactional
  @Override
  public void saveWithDish(SetmealDTO setmealDTO) {
    Setmeal setmeal = new Setmeal();
    BeanUtils.copyProperties(setmealDTO, setmeal);
    // 向套餐表插入数据
    setmealMapper.insert(setmeal);
    // 获取生成的套餐id
    Long setmealId = setmeal.getId();

    List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
    setmealDishes.forEach(
        setmealDish -> {
          setmealDish.setSetmealId(setmealId);
        });

    // 保存套餐和菜品的关联关系
    setmealDishMapper.insertBatch(setmealDishes);
  }

  /**
   * 分页查询
   *
   * @param setmealPageQueryDTO
   * @return
   */
  @Override
  public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

    int pageNum = setmealPageQueryDTO.getPage();
    int pageSize = setmealPageQueryDTO.getPageSize();

    PageHelper.startPage(pageNum, pageSize);
    Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

    return new PageResult(page.getTotal(), page.getResult());
  }

  /**
   * 批量删除套餐
   *
   * @param ids
   */
  @Transactional
  public void deleteBatch(List<Long> ids) {
    ids.forEach(
        id -> {
          Setmeal setmeal = setmealMapper.getById(id);
          if (StatusConstant.ENABLE == setmeal.getStatus()) {
            // 起售套餐不能删除
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
          }
        });
    ids.forEach(
        setmealId -> {
          // 删除套餐表中的数据
          setmealMapper.deleteById(setmealId);
          // 删除套餐菜品关系表中的数据
          setmealDishMapper.deleteBySetmealId(setmealId);
        });
  }

  /**
   * 根据id查询套餐和关联的菜品数据
   *
   * @param id
   * @return
   */
  public SetmealVO getByIdWithDish(Long id) {
    Setmeal setmeal = setmealMapper.getById(id);
    List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealIds(id);
    SetmealVO setmealVO = new SetmealVO();
    BeanUtils.copyProperties(setmeal, setmealVO);
    setmealVO.setSetmealDishes(setmealDishes);
    return setmealVO;
  }

  /**
   * 修改套餐
   *
   * @param setmealDTO
   */
  @Transactional
  public void update(SetmealDTO setmealDTO) {

    Setmeal setmeal = new Setmeal();
    BeanUtils.copyProperties(setmealDTO, setmeal);

    // 修改套餐 执行update操作
    setmealMapper.update(setmeal);

    // 获取套餐id
    Long setmealId = setmealDTO.getId();

    // 删除套餐和菜品的关联关系
    setmealDishMapper.deleteBySetmealId(setmealId);

    List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
    setmealDishes.forEach(
        setmealDish -> {
          setmealDish.setSetmealId(setmealId);
        });
    // 重新插入套餐和菜品的关系
    setmealDishMapper.insertBatch(setmealDishes);
  }

  /**
   * 套餐起售停售
   *
   * @param status
   * @param id
   */
  public void startOrStop(Integer status, Long id) {
    // 起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
    if (status ==StatusConstant.ENABLE){

      List<Dish> dishList = dishMapper.getBySetmealId(id);
      if (dishList !=null &&dishList.size()>0){
        dishList.forEach(dish->{
          if (StatusConstant.DISABLE ==dish.getStatus()){
            throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);

          }
        });
      }
    }
    Setmeal setmeal = Setmeal.builder()
            .id(id)
            .status(status)
            .build();
    setmealMapper.update(setmeal);
  }
}
